Rainfall Erosivity Factor of Korean Soils Estimated by Using USLE under Climate Change

Sustainable soil environment along with available water resources is critical for food security and agricultural productivity. The Korea territory consists of 65% mountainous topography the variability rainfall rapidly increasing due to climate change, thereby a risk erosion. Soil erosion by has been estimated using empirical equations accumulated data over time in U.S. since 1930 s, representatively Universal Loss Equation (USLE) published Department Agriculture (USDA); however, this model not always well fitted estimations other countries because different regional characteristics. Moreover, application conventional like USLE estimation under change appropriate. This study employed erosivity past 30 years (1981 - 2010) recent 10 (2011 2020) observed from ≤60 observations compared them evaluate effect on Korea. relationship between daily maximum precipitation was positive (R2 = 0.66), but indicated central tendencies years. values southeast part country, e.g., Daegu, Ulsan, Busan, have increased last those more effective practical technique should further be developed ensure effects Mapping average annual R factor each decade.